We use the following datasets as OOD testing set \(\mathcal {D}_\text{in}^{\text{test}}\) :
(i) SNLI refers to the hypotheses portion of the SNLI dataset [1]} used for natural language inference. (ii) IMDB [2]} consists of highly polar movie reviews used for sentiment classification.
(iii) M30K refers to the English portion of Multi-30K [3]}, a dataset of image descriptions.
(iv) WMT16 denotes the English portion of the test set from WMT16.
(v) Yelp is a dataset of restaurant reviews.
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